Display panel, driving method thereof and display device

Abstract

The application discloses a display panel and a driving method thereof and a display device, relates to the technical field of display, and aims to improve the ambient light detection precision of the display panel. The display panel comprises a non-display area arranged in a ring around a display area, the non-display area is provided with a black matrix, each light sensing module is composed of a working light sensing tube and a reference light sensing tube arranged in a light transmission area and a light shielding area of the black matrix respectively, a light sensing control module determines an aging degree factor of a first light sensing module according to an ambient light sensing voltage collected by the working light sensing tube and a dark state drift voltage collected by the reference light sensing tube, determines an adaptive light sensing threshold value according to the aging degree factor and a preset light sensing reference threshold value, and determines a light environment state of the light transmission area according to a differential light sensing voltage of the working light sensing tube in the first light sensing module and the adaptive light sensing threshold value; and the light sensing control module controls the first light sensing module and a second light sensing module to alternately work according to the light environment state and / or an exposure working time length when the first light sensing module is in an open state.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel, its driving method, and a display device. Background Technology

[0002] With the continuous development of display technology, ambient light sensors are increasingly used in the automatic adjustment of backlight in display panels, and users have also put forward higher requirements for the ambient light detection accuracy of display panels.

[0003] In existing technologies, display panels use a single ambient light sensor to sense ambient light brightness and automatically adjust the screen backlight based on the photocurrent output by the ambient light sensor. This means that the changes in photocurrent detected by the display panel may originate from actual changes in ambient light or from the degradation of photoelectric conversion efficiency caused by material aging of the ambient light sensor. As a result, the display panel cannot effectively distinguish between changes in ambient light and aging drift of the ambient light sensor, leading to misjudgments in backlight adjustment. Furthermore, the single ambient light sensor continuously receives ambient light in a long-term high-brightness environment, and the light degradation process is continuously accelerated, forming a vicious cycle that eventually leads to the complete failure of the ambient light sensor. This prevents the screen backlight from responding effectively to changes in ambient light, thus severely affecting the ambient light detection accuracy of the display panel.

[0004] Therefore, improving the ambient light detection accuracy of display panels is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The main objective of this application is to provide a display panel and its driving method, which aims to improve the ambient light detection accuracy of the display panel.

[0006] To achieve the above objectives, this application provides a display panel, the display panel including a display area and a non-display area arranged in a ring around the display area, the non-display area being provided with a black matrix, the black matrix including a light-transmitting area and a light-blocking area, characterized in that the display panel includes: Two light-sensing modules are provided. Each light-sensing module includes a working light sensor tube disposed in the light-transmitting area and a reference light sensor tube disposed in the light-shielding area. The working light sensor tube and the reference light sensor tube are of the same model. The working light sensor tube is used to collect the ambient light voltage of the light-transmitting area, and the reference light sensor tube is used to simultaneously collect the dark-state drift voltage of the light-shielding area when the working light sensor tube collects the ambient light voltage. A light-sensing control module, electrically connected to each of the light-sensing modules, is configured as follows: An aging factor for the first light-sensing module is determined based on the ambient light sensing voltage and the dark-state drift voltage. An adaptive light-sensing threshold is determined based on the aging factor and a preset light-sensing reference threshold. The first light-sensing module is any one of the two light-sensing modules. The light environment state of the light-transmitting area is determined based on the differential photosensitive voltage of the working photosensitive tube in the first photosensitive module and the adaptive photosensitive threshold. Based on the ambient light conditions and / or the exposure duration when the first light sensor module is in the on state, the first light sensor module and the second light sensor module are controlled to work alternately. The second light sensor module is the light sensor module other than the first light sensor module among the two light sensor modules.

[0007] In one embodiment, the light sensing control module includes a first control signal line, a first switching module, and a first compensation module, wherein the working light sensor and the reference light sensor in the first light sensing module are the first light sensor and the second light sensor, respectively. The first control signal line is electrically connected to the gate of the first phototransistor and the gate of the second phototransistor, respectively. The first path terminal of the first phototransistor and the first path terminal of the second phototransistor are electrically connected to a preset power supply potential terminal, respectively. The second path terminal of the first phototransistor is electrically connected to the signal input node of the first switching module and the signal compensation node of the first compensation module, respectively. The second path terminal of the second phototransistor is electrically connected to the inverting input node of the first compensation module. The light sensing control module further includes a second control signal line, a second switching module, and a second compensation module. The working light sensor and the reference light sensor in the second light sensing module are the third light sensor and the fourth light sensor, respectively. The second control signal line is electrically connected to the gate of the third phototransistor and the gate of the fourth phototransistor, respectively. The first path terminal of the third phototransistor and the first path terminal of the fourth phototransistor are electrically connected to a preset power supply potential terminal, respectively. The second path terminal of the third phototransistor is electrically connected to the signal input node of the second switching module and the signal compensation node of the second compensation module, respectively. The second path terminal of the fourth phototransistor is electrically connected to the inverting input node of the second compensation module.

[0008] In one embodiment, the first switching module includes: a first subtractor, a first comparator, a first switching transistor, a second switching transistor, a first resistor, a second resistor, and a first control transistor; The first path terminal of the first switching transistor is electrically connected to the first path terminal of the second switching transistor; The connection node of the first path terminal of the first switching transistor and the first path terminal of the second switching transistor forms the signal input node of the first switching module, which is electrically connected to the second path terminal of the first photosensitive transistor and the signal compensation node of the first compensation module, respectively. The gate of the first switch is electrically connected to a preset first gate signal terminal, the second path terminal of the first switch is electrically connected to the first terminal of the first resistor, and the second terminal of the first resistor is electrically connected to the first input terminal of the first subtractor. The gate of the second switch is electrically connected to a preset second gate signal terminal, the second path terminal of the second switch is electrically connected to the first terminal of the second resistor, and the second terminal of the second resistor is electrically connected to the second input terminal of the first subtractor. The output of the first subtractor is electrically connected to the inverting input of the first comparator, the non-inverting input of the first comparator is electrically connected to a preset adaptive threshold signal, the output of the first comparator is electrically connected to the gate of the first control transistor, the first path terminal of the first control transistor is electrically connected to a preset low potential terminal, and the second path terminal of the first control transistor is electrically connected to the second control signal line. The second switching module includes a second subtractor, a second comparator, a third switch, a fourth switch, a third resistor, a fourth resistor, and a second control transistor; The first path terminal of the third switch is electrically connected to the first path terminal of the fourth switch. The connection point where the first path terminal of the third switch is electrically connected to the first path terminal of the fourth switch forms the signal input node of the second switching module, and is electrically connected to the second path terminal of the third photosensitive tube and the signal compensation node of the second compensation module, respectively. The gate of the third switch is electrically connected to a preset first gate signal terminal, the second path terminal of the third switch is electrically connected to the first terminal of the third resistor, and the second terminal of the third resistor is electrically connected to the first input terminal of the second subtractor. The gate of the fourth switch is electrically connected to a preset second gate signal terminal, the second path terminal of the fourth switch is electrically connected to the first terminal of the fourth resistor, and the second terminal of the fourth resistor is electrically connected to the second input terminal of the second subtractor. The output of the second subtractor is electrically connected to the inverting input of the second comparator, the non-inverting input of the second comparator is electrically connected to a preset adaptive threshold signal, the output of the second comparator is electrically connected to the gate of the second control transistor, the first path terminal of the second control transistor is electrically connected to a preset low potential terminal, and the second path terminal of the second control transistor is electrically connected to the first control signal line.

[0009] In one embodiment, the first compensation module includes: a fifth resistor, a third comparator, and a fifth switching transistor; The first end of the fifth resistor constitutes the inverting input node of the first compensation module and is electrically connected to the second path terminal of the second photosensitive tube. The second end of the fifth resistor is electrically connected to the inverting input of the third comparator, the non-inverting input of the third comparator is electrically connected to a preset reference signal terminal, the output of the third comparator is electrically connected to the gate of the fifth switch, and the first path terminal of the fifth switch is electrically connected to a compensation voltage source. The second path terminal of the fifth switching transistor constitutes the signal compensation node of the first compensation module, and is electrically connected to the signal input node of the first switching module and the second path terminal of the first photosensitive transistor, respectively. The second compensation module includes: a sixth resistor, a fourth comparator, and a sixth switching transistor; The first end of the sixth resistor constitutes the inverting input node of the second compensation module and is electrically connected to the second path terminal of the fourth photosensitive tube. The second end of the sixth resistor is electrically connected to the inverting input of the fourth comparator, the non-inverting input of the fourth comparator is electrically connected to a preset reference signal terminal, the output of the fourth comparator is electrically connected to the gate of the sixth switch, and the first path terminal of the sixth switch is electrically connected to a compensation voltage source. The second path terminal of the sixth switch tube constitutes the signal compensation node of the second compensation module, and is electrically connected to the signal input node of the second switching module and the second path terminal of the third photosensitive tube, respectively.

[0010] In one embodiment, the display panel includes: A first substrate, wherein both the first photosensitive module and the second photosensitive module are disposed on the first substrate; A second substrate is disposed opposite to the first substrate, and a black matrix is ​​disposed between the second substrate and the first substrate. The black matrix is ​​disposed on the side of the second substrate facing the first substrate, wherein the black matrix includes alternating light-shielding areas and light-transmitting areas. The working photosensitive tube is disposed corresponding to the light-transmitting area in a direction perpendicular to the first substrate, and the reference photosensitive tube is disposed corresponding to the light-shielding area in a direction perpendicular to the first substrate.

[0011] Furthermore, this application also provides a driving method for a display panel, the driving method being applied to the display panel described above, the driving method comprising: When the working photosensitive tube in the first photosensitive module collects the ambient light voltage of the light-transmitting area, the reference photosensitive tube in the first photosensitive module is controlled to synchronously collect the dark-state drift voltage of the light-shielding area. The first photosensitive module can be any one of the two photosensitive modules. When the light sensing control module receives the ambient light sensing voltage and the dark state drift voltage, it determines the aging degree factor of the first light sensing module based on the ambient light sensing voltage and the dark state drift voltage, and determines the adaptive light sensing threshold based on the aging degree factor and the preset light sensing reference threshold. The light environment state of the light-transmitting area is determined based on the differential light-sensing voltage of the working light sensor and the adaptive light-sensing threshold. Based on the light environment state and / or the exposure working time when the first light sensor is in the on state, the first light sensor and the second light sensor are controlled to work alternately. The second light sensor is the light sensor other than the first light sensor among the two light sensor modules.

[0012] In one embodiment, the step of determining the light environment state of the light-transmitting area based on the differential photosensitive voltage of the working photosensitive tube in the first photosensitive module and the adaptive photosensitive threshold includes: Determine the differential photosensitive voltage of the working photosensitive tube in the first photosensitive module in multiple consecutive detection cycles, and detect whether the differential photosensitive voltage in multiple consecutive detection cycles is less than the adaptive photosensitive threshold. When the differential photosensitive voltage in each detection cycle is less than the adaptive photosensitive threshold, the light environment state of the light-transmitting area is determined to be a stable light state. When the differential photosensitive voltage in each detection cycle is greater than or equal to the adaptive photosensitive threshold, the light environment state of the light-transmitting area is determined to be a sudden light state.

[0013] In one embodiment, the step of controlling the alternating operation of the first light sensing module and the second light sensing module based on the ambient light conditions and / or the exposure duration when the first light sensing module is in the on state includes: In response to a stable light environment state, the first light sensor module remains in the "on" state and the second light sensor module remains in the "off" state until the light environment state changes from a stable light state to a sudden light state. At this point, the first light sensor module is switched from the "on" state to the "off" state, and simultaneously the second light sensor module is switched from the "off" state to the "on" state, thus completing the alternating operation of the first and second light sensor modules; and / or, The exposure duration of the first light-sensing module when it is in the "on" state is accumulated, and the dynamic switching threshold of the first light-sensing module is obtained. When the cumulative exposure time reaches the dynamic switching threshold of the first light-sensing module, the first light-sensing module is switched from the on state to the off state, and the second light-sensing module is switched from the off state to the on state simultaneously, so as to complete the alternating operation of the first light-sensing module and the second light-sensing module.

[0014] In one embodiment, the step of obtaining the dynamic switching threshold of the first light-sensing module includes: The current aging threshold of the first photosensitive module is determined based on the dark-state drift voltage of the reference photosensitive tube; If the current aging threshold is less than the preset mild aging threshold, the basic rotation threshold of the first photosensitive module is updated according to the current aging threshold, and the updated basic rotation threshold is used as the dynamic rotation threshold of the first photosensitive module. If the current aging threshold is greater than or equal to the mild aging threshold, the dynamic rotation threshold of the first photosensitive module is determined as the basic rotation threshold.

[0015] In addition, this application also provides a display device, the display device including the display panel described above; and / or, a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the driving method for the display panel described above.

[0016] This application solves the technical problem of decreased detection accuracy caused by a single ambient light sensor's inability to distinguish between changes in real ambient light and sensor aging drift by setting up two light-sensing modules and a light-sensing control module electrically connected to each light-sensing module. When the first light-sensing module is activated, the working photocell located in the light-transmitting area of ​​the black matrix collects the ambient light voltage, while the reference photocell located in the light-shielding area of ​​the black matrix simultaneously collects the dark-state drift voltage. Since the reference photocell and the working photocell are of the same model and bear the same aging stress, but the reference photocell is covered by the light-shielding area of ​​the black matrix and is not affected by ambient light, the dark-state drift voltage reflects the intrinsic output offset of the working photocell caused by material aging at the current moment. The light-sensing control module determines the aging degree factor based on the ambient light voltage and the dark-state drift voltage, and dynamically corrects the preset light-sensing reference threshold based on the aging degree factor to generate an adaptive light-sensing threshold, thus offsetting the judgment caused by the proportional decay of the differential light-sensing voltage due to the degradation of the photoelectric conversion efficiency of the working photocell. The reference is relatively drifted; the light-sensing control module then determines the light environment state of the light-transmitting area based on the comparison result of the differential light-sensing voltage and the adaptive light-sensing threshold, reflecting the real ambient light changes in the environment where the display panel is located; furthermore, the light-sensing control module controls the first light-sensing module and the second light-sensing module to work alternately based on the light environment state and / or the exposure working time of the first light-sensing module, balancing the cumulative stress of light irradiation of the two light-sensing modules, thereby achieving a balanced distribution of light irradiation stress of a single light-sensing module with minimal overhead of dual light-sensing module rotation. This avoids the accelerated aging of a single light-sensing module due to long-term exposure to ambient light, and ensures that the display panel can still work reliably after some components age through hardware redundancy. While effectively taking into account the lifespan of the light-sensing module, it significantly improves the ambient light detection accuracy of the display panel. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural block diagram of the first embodiment of the display panel of this application; Figure 2 This is a circuit diagram of the display panel involved in the embodiments of this application; Figure 3The above are signal waveform diagrams of the first gate signal and the second gate signal involved in the embodiments of this application. Figure 4 This is a schematic diagram of the layout of the light-sensing module involved in the embodiments of this application; Figure 5 A flowchart illustrating the second embodiment of the driving method for the display panel in this application; Figure 6 The above are signal waveform diagrams of the first control signal line and the second control signal line involved in the embodiments of this application. Figure 7 This is a schematic diagram of the structure of the display device involved in the embodiments of this application.

[0020] Explanation of icon numbers: 100. Display panel; 10. Black matrix; 11. Light-transmitting area; 21. Working photosensitive tube; 12. Light-shielding area; 22. Reference photosensitive tube; 30. Photosensitive control module; 20-1. First photosensitive module; 20-2. Second photosensitive module; LC1. First control signal line; 301. First switching module; 302. First compensation module; D1. First photosensitive tube; D2. Second photosensitive tube; LC2. Second control signal line; 310. Second switching module; 320. Second compensation module; D3. Third photosensitive tube; D4. Fourth photosensitive tube; U1. First subtractor; A1. First comparator; T1. First switching transistor; T2. Second switching transistor; R1. First resistor; R2. Second resistor; Q1. First control transistor; U2. Second control transistor; Subtractor; A2, Second comparator; T3, Third switch; T4, Fourth switch; R3, Third resistor; R4, Fourth resistor; Q2, Second control transistor; R5, Fifth resistor; A3, Third comparator; T5, Fifth switch; R6, Sixth resistor; A4, Fourth comparator; T6, Sixth switch; 101, First substrate; 102, Second substrate; G1, First gate signal terminal; G2, Second gate signal terminal; VDD, Power supply potential terminal; VCOM, Compensation voltage source; VGL, Low potential terminal; VREF1, Reference signal terminal; VREF2, Adaptive threshold signal terminal; 1001, Processor; 1002, Communication bus; 1003, User interface; 1004, Network interface; 1005, Memory.

[0021] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0025] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0026] With the continuous development of display technology, ambient light sensors are increasingly used in the automatic adjustment of backlight in display panels, and users have also put forward higher requirements for the ambient light detection accuracy of display panels.

[0027] In existing technologies, display panels use a single ambient light sensor to sense ambient light brightness and automatically adjust the screen backlight based on the photocurrent output by the ambient light sensor. This means that the changes in photocurrent detected by the display panel may originate from actual changes in ambient light or from the degradation of photoelectric conversion efficiency caused by material aging of the ambient light sensor. As a result, the display panel cannot effectively distinguish between changes in ambient light and aging drift of the ambient light sensor, leading to misjudgments in backlight adjustment. Furthermore, the single ambient light sensor continuously receives ambient light in a long-term high-brightness environment, and the light degradation process is continuously accelerated, forming a vicious cycle that eventually leads to the complete failure of the ambient light sensor. This prevents the screen backlight from responding effectively to changes in ambient light, thus severely affecting the ambient light detection accuracy of the display panel.

[0028] Therefore, improving the ambient light detection accuracy of display panels is a technical problem that urgently needs to be solved in this field.

[0029] To address the aforementioned technical deficiencies, this application provides a display panel, a driving method thereof, and a display device.

[0030] This application provides a display panel 100, referring to... Figure 1 As shown, Figure 1 This is a structural block diagram of the first embodiment of the display panel 100 of this application. The display panel 100 provided in this application includes a display area and a non-display area arranged in a ring around the display area. The non-display area is provided with a black matrix 10, which includes a light-transmitting area 11 and a light-blocking area 12. The display panel 100 includes: Two light-sensing modules are provided. The light-sensing modules include a working light sensor 21 disposed in the light-transmitting area 11 and a reference light sensor 22 disposed in the light-shielding area 12. The working light sensor 21 and the reference light sensor 22 are of the same model. The working light sensor 21 is used to collect the ambient light voltage of the light-transmitting area 11, and the reference light sensor 22 is used to simultaneously collect the dark-state drift voltage of the light-shielding area 12 when the working light sensor 21 collects the ambient light voltage.

[0031] In this embodiment, refer to Figure 1In each light-sensing module, since the working light sensor 21 is located in the light-transmitting area 11 of the black matrix 10, ambient light can pass through the light-transmitting area 11 and illuminate the working light sensor 21, enabling the working light sensor 21 to generate a corresponding light-sensing current in response to the ambient light intensity, thereby outputting an ambient light-sensing voltage reflecting the current light environment of the display panel 100. Since the reference light sensor 22 is of the same model as the working light sensor 21, and the reference light sensor 22 and the working light sensor 21 are subjected to the same temperature stress and voltage stress during operation, that is, the aging degree of the reference light sensor 22 and the working light sensor 21 due to non-optical stress is the same, the drift amount of the output signal of the reference light sensor 22 is synchronous and equal to the aging drift amount of the output signal of the working light sensor 21 due to non-optical stress. Therefore, while the working photosensitive tube 21 collects the ambient light voltage of the display panel 100 in the current light environment, the reference photosensitive tube 22, which is isolated from the external ambient light, simultaneously collects the dark-state drift voltage of the working photosensitive tube 21 during operation due to aging factors (such as temperature stress, voltage stress, etc.), providing an accurate and reliable data basis for subsequently determining the aging degree factor of each photosensitive module.

[0032] It should be noted that light-transmitting area 11 refers to... Figure 1 The black matrix 10 shown has areas with openings or through holes, allowing ambient light to enter the working photosensitive tube 21 below the black matrix 10 through these light-transmitting areas 11. The light-shielding area 12 refers to the area in the black matrix 10 without openings; the black matrix material of this light-shielding area 12 effectively blocks the incidence of ambient light. The working photosensitive tube 21 and the reference photosensitive tube 22 can be understood as photosensitive elements of the same type, such as thin-film transistors, photodiodes, or photoresistors. This application does not impose any limitations and they can be customized based on application requirements.

[0033] A light-sensing control module 30 is electrically connected to each light-sensing module. The light-sensing control module 30 is configured to: determine the aging factor of the first light-sensing module 20-1 based on the ambient light sensing voltage and the dark-state drift voltage, and determine the adaptive light-sensing threshold based on the aging factor and a preset light-sensing reference threshold. The first light-sensing module 20-1 is either one of the two light-sensing modules. The light environment state of the light-transmitting area 11 is determined based on the differential light-sensing voltage of the working light sensor 21 in the first light-sensing module 20-1 and the adaptive light-sensing threshold. Based on the light environment state and / or the exposure working time when the first light-sensing module 20-1 is in the on state, the first light-sensing module 20-1 and the second light-sensing module 20-2 are controlled to work alternately. The second light-sensing module 20-2 is the light-sensing module other than the first light-sensing module 20-1.

[0034] In this embodiment, through the electrical connection between the light sensing control module 30 and each light sensing module, the light sensing control module 30 can acquire in real time the ambient light sensing voltage collected by the working light sensor 21 in any light sensing module (i.e., the first light sensing module 20-1) and the dark-state drift voltage collected by the reference light sensor 22. Next, based on the voltage comparison difference between the dark-state drift voltage and the ambient light sensing voltage, the aging degree factor of the working light sensor 21 in the first light sensing module 20-1 can be accurately obtained to quantify the degradation ratio of the photocurrent conversion efficiency of the working light sensor 21 relative to its initial factory state. Subsequently, based on the aging degree factor and the preset light sensing reference threshold, the adaptive light sensing that dynamically adjusts with the aging degree of the working light sensor 21 can be accurately obtained. A threshold is set to maintain the detection sensitivity of the working photosensitive tube 21 relatively constant throughout its lifespan. Next, the differential photosensitive voltage of the working photosensitive tube 21 in the first photosensitive module 20-1 is compared with this adaptive photosensitive threshold to accurately determine the light environment state of the display panel 100 in the current light environment, thus achieving accurate detection of changes in ambient light around the display panel 100. Finally, based on the light environment state and / or the exposure working time of the first photosensitive module 20-1, the first photosensitive module 20-1 and the second photosensitive module 20-2 are controlled to work alternately, avoiding the long-term continuous exposure of a single photosensitive module to light irradiation stress, thereby effectively delaying the photoaging process of each photosensitive module and extending the overall lifespan of the light sensing detection of the display panel 100.

[0035] In a specific embodiment, the preset light-sensing reference threshold is determined by the absolute brightness level of the current lighting environment in which the display panel 100 is located. For example, if the absolute brightness level is less than the preset lower limit threshold of conventional illuminance (e.g., 100 lux), it is determined that the display panel 100 is in a dark environment. Since the light-sensing current output by the photosensitive tube 21 is weak in a dark environment, the light-sensing reference threshold is lowered to the first light-sensing threshold corresponding to the dark environment to improve the detection sensitivity of the photosensitive tube 21 to small changes in ambient light in a dark environment, and to avoid the display panel 100 from having a sluggish backlight adjustment response in a dark environment. If the absolute brightness level is less than or equal to the preset upper limit threshold of conventional illuminance (e.g., 1000 lux), it is determined that the display panel 100 is in a strong light environment. Since the human eye is not sensitive to brightness changes over a large range in a strong light environment, and the absolute change in ambient light is large, the light-sensing reference threshold is raised to the second light-sensing threshold corresponding to the strong light environment to avoid the backlight adjustment of the display panel 100 from responding frequently to non-critical brightness fluctuations, and to reduce the system power consumption of the display panel 100.

[0036] It should be noted that the first light-sensing threshold is less than the second light-sensing threshold, and the absolute brightness level is determined based on the light-sensing current output by the working light sensor 21 in the light-sensing module. If the working light sensor 21 has not yet experienced aging drift, this light-sensing current is the original light-sensing current signal output by the working light sensor 21; if the working light sensor 21 has experienced significant aging drift, this light-sensing current refers to the original light-sensing current signal output by the working light sensor 21 after compensation processing by the light-sensing control module 30.

[0037] Furthermore, in another feasible implementation, refer to Figure 2 As shown, the light sensing control module 30 includes a first control signal line LC1, a first switching module 301, and a first compensation module 302. The working light sensor 21 and the reference light sensor 22 in the first light sensing module 20-1 are the first light sensor D1 and the second light sensor D2, respectively. The first control signal line LC1 is electrically connected to the gate of the first light sensor D1 and the gate of the second light sensor D2, respectively. The first path terminal of the first light sensor D1 and the first path terminal of the second light sensor D2 are electrically connected to the preset power supply potential terminal VDD, respectively. The second path terminal of the first light sensor D1 is electrically connected to the signal input node of the first switching module 301 and the signal compensation node of the first compensation module 302, respectively. The second path terminal of the second light sensor D2 is electrically connected to the inverting input node of the first compensation module 302.

[0038] In this embodiment, the first control signal line LC1 simultaneously outputs the same first control signal to the gate of the first photodetector D1 and the gate of the second photodetector D2, so that the first photodetector D1 and the second photodetector D2 are synchronously turned on or off. When the first control signal represents a high level, the first photodetector D1 and the second photodetector D2 are synchronously turned on under the high-level drive, and the same operating power is provided to the first photodetector D1 and the second photodetector D2 respectively through the preset power supply potential terminal VDD. At this time, the first photodetector D1 receives external ambient light through the light-transmitting area 11 of the black matrix 10, and generates a first photosensitive current in response to the illumination of the external ambient light. The first photosensitive current passes through the turned-on first photodetector D1, and after converging with the compensation photosensitive current output by the first compensation module 302, it is output to the signal input node of the first switching module 301, so as to realize the function of the first photodetector D1 collecting the ambient light sensing voltage of the light-transmitting area 11. Meanwhile, the second photosensitive tube D2 is blocked by the black matrix material of the black matrix 12 because it is located in the light-shielding area 12 of the black matrix 10. This causes the second photosensitive tube D2 to simultaneously collect the dark-state drift voltage, which characterizes the aging degree of the first photosensitive tube D1, when the first photosensitive tube D1 collects the ambient light voltage. The second photosensitive current is output to the inverting input node of the first compensation module 302 through the conducting second photosensitive tube D2. At this time, the first compensation module 302 determines whether to perform aging offset compensation on the first photosensitive tube D1 based on the comparison result between the rated reference voltage of the second photosensitive tube D2 and the dark-state drift voltage, so as to ensure that the ambient light voltage collected by the first photosensitive tube D1 is not affected by the aging drift of the first photosensitive tube D1 itself, and can truly reflect the real ambient light intensity of the display panel 100 under the current light environment.

[0039] It should be noted that when the first photocell D1 does not require aging offset compensation, the value of the compensation photocell current provided by the first compensation module 302 is 0, that is, there is no compensation photocell current output; when the first photocell D1 requires aging offset compensation, the compensation photocell current refers to the current signal output by the fifth switch T5 in the first compensation module 302 when it is turned on.

[0040] The second control signal line LC2 is electrically connected to the gate of the third phototransistor D3 and the gate of the fourth phototransistor D4, respectively. The first path terminal of the third phototransistor D3 and the first path terminal of the fourth phototransistor D4 are electrically connected to the preset power supply potential terminal VDD, respectively. The second path terminal of the third phototransistor D3 is electrically connected to the signal input node of the second switching module 310 and the signal compensation node of the second compensation module 320, respectively. The second path terminal of the fourth phototransistor D4 is electrically connected to the inverting input node of the second compensation module 320.

[0041] In this embodiment, the second control signal line LC2 simultaneously outputs the same second control signal to the gates of the third photodetector D3 and the fourth photodetector D4, so that the third photodetector D3 and the fourth photodetector D4 are synchronously turned on or off. When the second control signal represents a high level, the third photodetector D3 and the fourth photodetector D4 are synchronously turned on under the high-level drive, and the same operating power is provided to the third photodetector D3 and the fourth photodetector D4 respectively through the preset power supply potential terminal VDD. At this time, the third photodetector D3 receives external ambient light through the light-transmitting area 11 of the black matrix 10, and generates a third photosensitive current in response to the illumination of the external ambient light. The third photosensitive current passes through the turned-on third photodetector D3, and after converging with the compensation photosensitive current output by the second compensation module 320, it is output to the signal input node of the second switching module 310 to realize the function of the third photodetector D3 collecting the ambient light sensing voltage of the light-transmitting area 11. Meanwhile, the fourth photosensitive tube D4 is blocked by the black matrix material of the black matrix 12 because it is located in the light-shielding area 12 of the black matrix 10. This causes the fourth photosensitive tube D4 to simultaneously collect the dark-state drift voltage, which characterizes the aging degree of the third photosensitive tube D3, when the third photosensitive tube D3 collects the ambient light voltage. The fourth photosensitive current is output to the inverting input node of the second compensation module 320 through the conducting fourth photosensitive tube D4. At this time, the second compensation module 320 determines whether to perform aging offset compensation on the third photosensitive tube D3 based on the comparison result between the rated reference voltage of the fourth photosensitive tube D4 and the dark-state drift voltage, so as to ensure that the ambient light voltage collected by the third photosensitive tube D3 is not affected by the aging drift of the third photosensitive tube D3 itself, and can truly reflect the real ambient light intensity of the display panel 100 under the current light environment.

[0042] It should be noted that when the third photocell D3 does not require aging offset compensation, the value of the compensation photocell current provided by the second compensation module 320 is 0, that is, there is no compensation photocell current output; when the third photocell D3 requires aging offset compensation, the compensation photocell current refers to the current signal output by the sixth switch T6 in the second compensation module 320 when it is turned on.

[0043] Furthermore, in some feasible embodiments, reference is made to Figure 2As shown, the first switching module 301 includes: a first subtractor U1, a first comparator A1, a first switch T1, a second switch T2, a first resistor R1, a second resistor R2, and a first control transistor Q1; the first path terminal of the first switch T1 is electrically connected to the first path terminal of the second switch T2; the connection node between the first path terminal of the first switch T1 and the first path terminal of the second switch T2 constitutes the signal input node of the first switching module 301, and is electrically connected to the second path terminal of the first photosensitive transistor D1 and the signal compensation node of the first compensation module 302, respectively; the gate of the first switch T1 is electrically connected to a preset first gate signal terminal G1, and the second path terminal of the first switch T1 is electrically connected to the first terminal of the first resistor R1. The second terminal of R1 is electrically connected to the first input terminal of the first subtractor U1; the gate of the second switch T2 is electrically connected to the preset second gate signal terminal G2; the second path terminal of the second switch T2 is electrically connected to the first terminal of the second resistor R2; the second terminal of the second resistor R2 is electrically connected to the second input terminal of the first subtractor U1; the output terminal of the first subtractor U1 is electrically connected to the inverting input terminal of the first comparator A1; the non-inverting input terminal of the first comparator A1 is electrically connected to the preset adaptive threshold signal terminal VREF2; the output terminal of the first comparator A1 is electrically connected to the gate of the first control transistor Q1; the first path terminal of the first control transistor Q1 is electrically connected to the preset low potential terminal VGL; and the second path terminal of the first control transistor Q1 is electrically connected to the second control signal line LC2.

[0044] In this embodiment, refer to Figure 2 The signal input node superimposes the first photosensitive current output by the first photosensitive tube D1 and the compensated photosensitive current output by the first compensation module 302 to obtain a superimposed current signal; at this time, referencing Figure 3 If the preset first gate signal terminal G1 outputs a high-level first gate signal to the gate of the first switch transistor T1, the first switch transistor T1 is turned on under the high-level drive, so that the superimposed current signal flows through the turned-on first switch transistor T1 and through the first resistor R1, forming a voltage drop across the first resistor R1; then, the voltage drop across the first resistor R1 is transmitted as the first photosensitive voltage to the first input terminal of the first subtractor U1. When the first gate signal jumps from high level to low level, the preset second gate signal terminal G2 outputs a high-level second gate signal to the gate of the second switch transistor T2, so that the second switch transistor T2 is turned on under the high-level drive, so that the superimposed current signal flows through the turned-on second switch transistor T2 and through the second resistor R2, forming a voltage drop across the second resistor R2; then, the voltage drop across the second resistor R2 is transmitted as the second photosensitive voltage to the second input terminal of the first subtractor U1.

[0045] Subsequently, the first subtractor U1, based on the difference between the received first and second photosensitive voltages and taking the absolute value, can accurately obtain the differential photosensitive voltage of the first photosensitive tube D1. This differential photosensitive voltage reflects whether the photocurrent conversion efficiency of the first photosensitive tube D1 will decrease with the increase of usage time under the same lighting environment. Next, in order to avoid misjudgment of the ambient light state caused by transient ambient light interference (such as the instantaneous flash of a flashlight in indoor scenes, the instantaneous shadow occlusion of passing objects, the instantaneous sweep of oncoming headlights in vehicle scenes, the instantaneous light and shadow changes at tunnel entrances, and transient light signals such as lightning and cloud cover in outdoor scenes), the first subtractor U1... The differential photosensitive voltage output by photosensitive tube D1 in multiple consecutive detection cycles is compared sequentially with the adaptive photosensitive threshold connected to the non-inverting input of the first comparator A1. Only when the differential photosensitive voltage is less than the adaptive photosensitive threshold in multiple consecutive detection cycles, the first comparator A1 outputs a high level indicating that the light environment is in a stable light state. This causes the first control tube Q1 to be turned on under the drive of the high level, so as to pull down the high potential provided by the second control signal line LC2 to the low potential VGL. This ensures that the second photosensitive module 20-2 remains in the off state during the period when the first photosensitive module 20-1 is working continuously in a stable light state.

[0046] Conversely, if the differential photosensitive voltage output by the first photosensitive tube D1 is greater than or equal to the adaptive photosensitive threshold in multiple consecutive detection cycles, then the first comparator A1 outputs a low level indicating that the ambient light state is in a sudden light state. The first control tube Q1 is turned off under the low-level drive, so that the second control signal line LC2 maintains a high-level output. At this time, the second photosensitive module 20-2 switches from the off state to the on state under the high-level drive, so as to take over the ambient light detection of the first photosensitive module 20-1 in the sudden light state. At the same time, the first control signal line LC1 outputs a low level, and the first photosensitive module 20-1 is turned off. If the ambient light condition subsequently recovers from a sudden change to a stable state, the second light sensor module 20-2 continues to operate, while the first light sensor module 20-1 remains off. This continues until the ambient light condition changes again or the exposure time of the second light sensor module 20-2 reaches its dynamic switching threshold. In this case, the second comparator A2 corresponding to the second light sensor module 20-2 outputs a low level representing the sudden change in light condition, controlling the corresponding second control transistor Q2 to turn off. This causes the first control signal line LC1 to switch from low to high, waking up the first light sensor module 20-1 from its off state. Simultaneously, the second control signal line LC2 switches to low, turning off the second light sensor module 20-2, completing the switching back from the second light sensor module 20-2 to the first light sensor module 20-1. This process repeats, achieving alternating operation and aging balance between the two light sensor modules.

[0047] It should be noted that, referring to Figure 3The first control transistor Q1, the first switch transistor T1, and the second switch transistor T2 can be N-type thin film transistors or N-type MOS transistors. The alternating conduction timing of the first switch transistor T1 and the second switch transistor T2 is controlled by the first gate signal provided by the first gate signal terminal G1 and the second gate signal provided by the second gate signal terminal G2. The first gate signal and the second gate signal are out of phase, that is, at any given time, only one of the first switch transistor T1 and the second switch transistor T2 is in the conducting state.

[0048] The second switching module 310 includes a second subtractor U2, a second comparator A2, a third switch T3, a fourth switch T4, a third resistor R3, a fourth resistor R4, and a second control transistor Q2. The first path terminal of the third switch T3 is electrically connected to the first path terminal of the fourth switch T4. The connection point between the first path terminal of the third switch T3 and the first path terminal of the fourth switch T4 constitutes the signal input node of the second switching module 310, and is electrically connected to the second path terminal of the third photosensitive transistor D3 and the signal compensation node of the second compensation module 320, respectively. The gate of the third switch T3 is electrically connected to a preset first gate signal terminal G1, and the second path terminal of the third switch T3 is electrically connected to the first terminal of the third resistor R3. The second terminal is electrically connected to the first input terminal of the second subtractor U2; the gate of the fourth switch T4 is electrically connected to the preset second gate signal terminal G2, the second path terminal of the fourth switch T4 is electrically connected to the first terminal of the fourth resistor R4, and the second terminal of the fourth resistor R4 is electrically connected to the second input terminal of the second subtractor U2; the output terminal of the second subtractor U2 is electrically connected to the inverting input terminal of the second comparator A2, the non-inverting input terminal of the second comparator A2 is electrically connected to the preset adaptive threshold signal terminal VREF2, the output terminal of the second comparator A2 is electrically connected to the gate of the second control transistor Q2, the first path terminal of the second control transistor Q2 is electrically connected to the preset low potential terminal VGL, and the second path terminal of the second control transistor Q2 is electrically connected to the first control signal line LC1.

[0049] In this embodiment, refer to Figure 2 In the second photosensitive module 20-2 corresponding to the second switching module 310, the working photosensitive tube 21 and the reference photosensitive tube 22 are the third photosensitive tube D3 and the fourth photosensitive tube D4, respectively. The signal input node of the second switching module 310 superimposes the third photosensitive current output by the third photosensitive tube D3 and the compensation photosensitive current output by the second compensation module 320 to obtain the superimposed current signal; at this time, the reference... Figure 3If the preset first gate signal terminal G1 outputs a first gate signal representing a high level to the gate of the third switch transistor T3, the third switch transistor T3 is turned on under the drive of the high level, so that the superimposed current signal flows through the turned-on third switch transistor T3 through the third resistor R3, and forms a voltage drop across the third resistor R3; then, the voltage drop across the third resistor R3 is transmitted as the third photosensitive voltage to the first input terminal of the second subtractor U2.

[0050] When the first gate signal transitions from high to low, a second gate signal representing a high level is output to the gate of the fourth switch T4 through the preset second gate signal terminal G2. The fourth switch T4 is turned on under the drive of the high level, so that the superimposed current signal can flow through the fourth resistor R4 through the turned-on fourth switch T4, and a voltage drop is formed across the fourth resistor R4. Subsequently, the voltage drop across the fourth resistor R4 is transmitted as the fourth photosensitive voltage to the second input terminal of the second subtractor U2.

[0051] Subsequently, the second subtractor U2, based on the difference between the received third and fourth photosensitive voltages and taking the absolute value, can accurately obtain the differential photosensitive voltage of the third photosensitive tube D3. This differential photosensitive voltage reflects whether the photocurrent conversion efficiency of the third photosensitive tube D3 will decrease with the increase of usage time under the same lighting environment. Next, in order to avoid misjudgment of the ambient light state caused by transient ambient light interference (such as the instantaneous flash of a flashlight in indoor scenes, the instantaneous shadow occlusion of passing objects, the instantaneous sweep of oncoming headlights in vehicle scenes, the instantaneous light and shadow changes at tunnel entrances, and transient light signals such as lightning and cloud cover in outdoor scenes), the second subtractor U2 will... The differential photosensitive voltage output by the three photosensitive diodes D3 in multiple consecutive detection cycles is compared sequentially with the adaptive photosensitive threshold connected to the non-inverting input of the second comparator A2. Only when the differential photosensitive voltage is less than the adaptive photosensitive threshold in multiple consecutive detection cycles, the second comparator A2 outputs a high level indicating that the light environment is in a stable light state. This causes the second control transistor Q2 to be turned on under the drive of the high level, so as to pull the high potential of the first control signal line LC1 down to the low potential VGL. This ensures that the first photosensitive module 20-1 remains in the off state during the period when the second photosensitive module 20-2 is working continuously in a stable light state.

[0052] Conversely, if the differential photosensitive voltage output by the third photosensitive tube D3 is greater than or equal to the adaptive photosensitive threshold in multiple consecutive detection cycles, then the second comparator A2 outputs a low level indicating that the ambient light state is in a sudden light state. The second control tube Q2 is turned off under the low-level drive, so that the first control signal line LC1 maintains a high-level output. At this time, the first photosensitive module 20-1 switches from the off state to the on state under the high-level drive, so as to take over the ambient light detection from the second photosensitive module 20-2 in the sudden light state. At the same time, the second control signal line LC2 outputs a low level, and the second photosensitive module 20-2 is turned off. If the ambient light condition subsequently recovers from a sudden change to a stable state, the first light sensor module 20-1 continues to operate, while the second light sensor module 20-2 remains off. This continues until the ambient light condition changes again or the exposure time of the first light sensor module 20-1 reaches its dynamic switching threshold. In this case, the first comparator A1 corresponding to the first light sensor module 20-1 outputs a low level representing the sudden change in light condition, controlling the corresponding first control transistor Q1 to turn off. This causes the second control signal line LC2 to switch from low to high, waking up the second light sensor module 20-2 from its off state. Simultaneously, the first control signal line LC1 switches to low, turning off the first light sensor module 20-1, completing the switching back from the first light sensor module 20-1 to the second light sensor module 20-2. This process repeats, achieving alternating operation and aging balance between the two light sensor modules.

[0053] It should be noted that, referring to Figure 3 The second control transistor Q2, the third switch transistor T3, and the fourth switch transistor T4 can be N-type thin film transistors or N-type MOS transistors. The alternating conduction timing of the third switch transistor T3 and the fourth switch transistor T4 is controlled by the first gate signal provided by the first gate signal terminal G1 and the second gate signal provided by the second gate signal terminal G2. The first gate signal and the second gate signal are out of phase, that is, at any given time, only one of the third switch transistor T3 and the fourth switch transistor T4 is in the conducting state.

[0054] Furthermore, in another embodiment, the display panel 100 may also include Figure 2The dimming module shown is electrically connected to the second path terminals of both the first photosensitive tube D1 and the third photosensitive tube D3. When the first photosensitive tube D1 is turned on, the third photosensitive tube D3 is turned off. Taking the turned-on first photosensitive tube D1 as an example, the ambient light voltage collected by the turned-on first photosensitive tube D1 is transmitted to the dimming module. This allows the dimming module to find the target backlight brightness value corresponding to the ambient light voltage from a preset voltage-brightness mapping table and output a backlight adjustment signal carrying the target backlight brightness value to the backlight drive circuit. Driven by the backlight adjustment signal, the backlight drive circuit adjusts the actual backlight brightness of the panel backlight area to match the target backlight brightness value. Specifically, when the ambient brightness is high, the dimming module controls the actual backlight brightness of the backlight area of ​​the control panel to increase accordingly to ensure the visibility of the displayed image; when the ambient brightness is low, the dimming module controls the actual backlight brightness of the backlight area of ​​the control panel to decrease accordingly to reduce power consumption and avoid glare.

[0055] Furthermore, in some other feasible embodiments, reference is made to... Figure 2 As shown, the first compensation module 302 includes: a fifth resistor R5, a third comparator A3, and a fifth switch T5; the first end of the fifth resistor R5 constitutes the inverting input node of the first compensation module 302 and is electrically connected to the second path terminal of the second photosensitive tube D2; the second end of the fifth resistor R5 is electrically connected to the inverting input terminal of the third comparator A3, the non-inverting input terminal of the third comparator A3 is electrically connected to the preset reference signal terminal VREF1, the output terminal of the third comparator A3 is electrically connected to the gate of the fifth switch T5, and the first path terminal of the fifth switch T5 is electrically connected to the compensation voltage source VCOM; the second path terminal of the fifth switch T5 constitutes the signal compensation node of the first compensation module 302 and is electrically connected to the signal input node of the first switching module 301 and the second path terminal of the first photosensitive tube D1, respectively.

[0056] In this embodiment, when the first photosensitive module 20-1 is in the ON state, the second photosensitive tube D2 works synchronously with the first photosensitive tube D1. At this time, the second photosensitive tube D2 is turned on under the drive of the high level provided by the first control signal line LC1, so that the dark state drift voltage characterized by the aging degree of the first photosensitive tube D1 collected by the second photosensitive tube D2 is transmitted to the inverting input terminal of the third comparator A3 through the fifth resistor R5. At the same time, the preset reference signal terminal VREF1 provides a reference voltage to the non-inverting input terminal of the third comparator A3. This reference voltage is the rated voltage value calibrated at the factory of the first photosensitive tube D1 and the second photosensitive tube D2 of the same model. Subsequently, the third comparator A3 compares the dark state drift voltage with the reference voltage. If the dark state drift voltage is less than the reference voltage, the third comparator A3 outputs a high level to act on the gate of the fifth switch T5, so that the fifth switch T5 is turned on under the drive of the high level, so that the compensation photosensitive current output by the compensation voltage source VCOM is transmitted to the first compensation through the turned-on fifth switch T5. Since the voltage threshold of the compensation voltage source VCOM is consistent with the dark state drift voltage, the compensation photosensitive current output by the compensation voltage source VCOM is equal in magnitude and opposite in direction to the drift current generated by the first photosensitive tube D1 due to aging. After the two are superimposed at the signal compensation node of the first compensation module 302, the drift current generated by the first photosensitive tube D1 due to aging is completely canceled by the compensation photosensitive current. This makes the superimposed current signal connected to the first switching module 301 no longer contain the drift component caused by aging factors such as temperature and voltage stress, and only retains the effective current component that reflects the real ambient illuminance.

[0057] Conversely, if the dark-state drift voltage, which represents the aging degree of the first photodetector D1, collected by the second photodetector D2 is greater than or equal to the reference voltage, it indicates that the first photodetector D1 has not undergone significant aging drift or that the dark-state drift voltage is within the preset allowable error range. At this time, the third comparator A3 outputs a low level, the fifth switch T5 is turned off, the compensation voltage source VCOM is disconnected from the signal compensation node of the first compensation module 302, and no compensation is performed. That is, the first switching module 301 only receives the first photosensitive current output by the first photodetector D1.

[0058] It should be noted that the fifth switch T5 can be an N-type thin-film transistor or an N-type MOS transistor.

[0059] The second compensation module 320 includes: a sixth resistor R6, a fourth comparator A4, and a sixth switch T6; the first end of the sixth resistor R6 constitutes the inverting input node of the second compensation module 320 and is electrically connected to the second path terminal of the fourth phototransistor D4; the second end of the sixth resistor R6 is electrically connected to the inverting input terminal of the fourth comparator A4, the non-inverting input terminal of the fourth comparator A4 is electrically connected to the preset reference signal terminal VREF1, the output terminal of the fourth comparator A4 is electrically connected to the gate of the sixth switch T6, and the first path terminal of the sixth switch T6 is electrically connected to the compensation voltage source VCOM; the second path terminal of the sixth switch T6 constitutes the signal compensation node of the second compensation module 320 and is electrically connected to the signal input node of the second switching module 310 and the second path terminal of the third phototransistor D3, respectively.

[0060] In this embodiment, when the second photosensitive module 20-2 is in the ON state, the fourth photosensitive tube D4 and the third photosensitive tube D3 operate synchronously. At this time, the fourth photosensitive tube D4 is turned on under the drive of the high level provided by the second control signal line LC2, so that the dark state drift voltage characterized by the aging degree of the third photosensitive tube D3 collected by the fourth photosensitive tube D4 is transmitted to the inverting input terminal of the fourth comparator A4 through the sixth resistor R6. At the same time, the preset reference signal terminal VREF1 provides a reference voltage to the non-inverting input terminal of the fourth comparator A4. This reference voltage is the rated voltage value calibrated at the factory for the third photosensitive tube D3 and the fourth photosensitive tube D4 of the same model. Subsequently, the fourth comparator A4 compares the dark state drift voltage with the reference voltage. If the dark state drift voltage is less than the reference voltage, the fourth comparator A4 outputs a high level to act on the gate of the sixth switch T6, so that the sixth switch T6 is turned on under the drive of the high level, so that the compensation photosensitive current output by the compensation voltage source VCOM is transmitted to the second compensation through the turned-on sixth switch T6. Since the voltage threshold of the compensation voltage source VCOM is consistent with the dark state drift voltage, the compensation photosensitive current output by the compensation voltage source VCOM is equal in magnitude and opposite in direction to the drift current generated by the third photosensitive tube D3 due to aging. After the two are superimposed at the signal compensation node of the second compensation module 320, the drift current generated by the third photosensitive tube D3 due to aging is completely canceled by the compensation photosensitive current. This makes the superimposed current signal connected to the second switching module 310 no longer contain the drift component caused by aging factors such as temperature and voltage stress, and only retains the effective current component that reflects the real ambient illuminance.

[0061] Conversely, if the dark-state drift voltage, which represents the aging degree of the third photodetector D3, collected by the fourth photodetector D4 is greater than or equal to the reference voltage, it indicates that the third photodetector D3 has not undergone significant aging drift or that the dark-state drift voltage is within the preset allowable error range. At this time, the fourth comparator A4 outputs a low level, the sixth switch T6 is turned off, the compensation voltage source VCOM is disconnected from the signal compensation node of the second compensation module 320, and no compensation is performed. That is, the second switching module 310 only receives the photocurrent output by the third photodetector D3.

[0062] It should be noted that the sixth switch T6 can be an N-type thin-film transistor or an N-type MOS transistor.

[0063] Furthermore, in some feasible embodiments, reference is made to Figure 4 As shown, the display panel 100 includes: a first substrate 101, on which the first light-sensing module 20-1 and the second light-sensing module 20-2 are both disposed; a second substrate 102 disposed opposite to the first substrate 101, wherein the black matrix 10 is disposed between the second substrate 102 and the first substrate 101, the black matrix 10 being disposed on the side of the second substrate 102 facing the first substrate 101, wherein the black matrix 10 includes alternately disposed light-shielding areas 12 and light-transmitting areas 11; a working light-sensing tube 21 is disposed corresponding to the light-transmitting area 11 in a direction perpendicular to the first substrate 101, and a reference light-sensing tube 22 is disposed corresponding to the light-shielding area 12 in a direction perpendicular to the first substrate 101.

[0064] In this embodiment, refer to Figure 4As shown, ambient light is incident from the side of the second substrate 102 that is away from the first substrate 101. When the ambient light reaches the black matrix 10, the opening in the light-transmitting area 11 allows the ambient light to pass through and illuminate the corresponding working photosensitive tube 21, so that the working photosensitive tube 21 can generate a photosensitive current in response to the ambient light intensity. The black matrix 10 in the light-shielding area 12 blocks the ambient light, so that the corresponding reference photosensitive tube 22 is always in a dark environment and cannot receive ambient light. Since the working photosensitive tube 21 and the reference photosensitive tube 22 are respectively arranged in a direction perpendicular to the first substrate 101, corresponding to the light-transmitting area 11 and the light-shielding area 12, and the working photosensitive tube 21 and the reference photosensitive tube 22 are of the same model, the working photosensitive tube 21 and the reference photosensitive tube 22 are subjected to the same temperature and voltage stress within the same display panel 100. Therefore, the dark-state drift voltage of the light-shielding area 12 can be collected simultaneously when the working photosensitive tube 21 collects the ambient light sensing voltage. This can accurately reflect the characteristic drift of the working photosensitive tube 21 of the same model due to aging factors such as temperature and voltage stress, providing an accurate data basis for subsequent aging drift compensation. This ensures that the ambient light sensing voltage collected by the working photosensitive tube 21 is not affected by its own aging characteristics, and only retains the effective current component that reflects the true ambient light intensity, significantly improving the accuracy and reliability of ambient light detection.

[0065] Furthermore, based on the first embodiment of the display panel of this application, a second embodiment of the driving method for the display panel of this application is proposed.

[0066] The driving method for the display panel described in this application is applied to the display panel mentioned above. This driving method is executed by the display device applied to the display panel. (Refer to...) Figure 5 The driving method for the display panel of this application includes the following implementation steps S10 to S30.

[0067] Step S10: When the working photosensitive tube in the first photosensitive module collects the ambient light voltage of the light-transmitting area, the reference photosensitive tube in the first photosensitive module is controlled to synchronously collect the dark-state drift voltage of the light-shielding area. The first photosensitive module can be any one of the two photosensitive modules.

[0068] In this embodiment, the light-sensing control module 30 controls the first light-sensing module 20-1 to be in an "on" state via a high-level signal provided by the first control signal line LC1. In the "on" first light-sensing module 20-1, reference... Figure 4External ambient light is incident from the side of the second substrate 102 that is away from the first substrate 101. When the ambient light reaches the black matrix 10, the opening in the light-transmitting area 11 allows the ambient light to pass through and illuminate the corresponding working photosensitive tube 21, so that the working photosensitive tube 21 can generate a photosensitive current and output an ambient light sensing voltage in response to the ambient light illuminance. The black matrix 10 located in the light-shielding area 12 blocks the ambient light, so that the corresponding reference photosensitive tube 22 is always in a dark environment and cannot receive ambient light, thereby outputting a dark state drift voltage. Since the working photosensitive tube 21 and the reference photosensitive tube 22 are of the same model, they are subjected to the same temperature and voltage stress within the same display panel. Therefore, by using the dark-state drift voltage collected by the reference photosensitive tube 22, we can understand the characteristic drift of the working photosensitive tube 21 of the same model caused by aging factors such as temperature and voltage stress. This provides an accurate data basis for subsequent aging drift compensation, so that the ambient light sensing voltage collected by the working photosensitive tube 21 is not affected by its own aging characteristics, and only retains the effective current component that reflects the true ambient light intensity, which significantly improves the accuracy and reliability of ambient light detection.

[0069] Step S20: When the light sensing control module receives the ambient light sensing voltage and the dark state drift voltage, it determines the aging degree factor of the first light sensing module based on the ambient light sensing voltage and the dark state drift voltage, and determines the adaptive light sensing threshold based on the aging degree factor and the preset light sensing reference threshold.

[0070] In this embodiment, after the light-sensing control module receives the ambient light sensing voltage and the dark-state drift voltage, it determines the voltage comparison difference between the dark-state drift voltage and the ambient light sensing voltage. The ratio of this voltage comparison difference to the reference voltage calibrated at the factory is used as an aging factor, thereby accurately quantifying the rate of decrease in photocurrent conversion efficiency of the working photosensitive tube relative to its initial factory state. Subsequently, based on this aging factor, the preset light-sensing reference threshold is adaptively adjusted to obtain an adaptive light-sensing threshold that adjusts synchronously with the aging degree of the working photosensitive tube. This effectively maintains the relative constancy of the photosensitive tube's detection sensitivity throughout its entire lifespan and provides an accurate and reliable judgment benchmark for subsequently judging the light environment state of the light-transmitting area, significantly improving the accuracy and reliability of the display panel's detection of ambient light changes.

[0071] It should be noted that the formula for expressing the aging degree factor is: ;in, Factors indicating the degree of aging; This represents the dark-state drift voltage acquired by the reference photodetector; This indicates the ambient light voltage collected by the working photosensor. This indicates the reference voltage set at the factory.

[0072] The formula for the adaptive light-sensing threshold is: ;in, Indicates the adaptive light-sensing threshold; This indicates the preset light-sensing reference threshold, which can be understood as the standard reference threshold of the light-sensing module calibrated at the factory of the display panel under normal lighting conditions. Normal lighting conditions refer to lighting environments between dark and strong light environments. Factors indicating the degree of aging.

[0073] Step S30: Determine the light environment state of the light-transmitting area based on the differential light-sensing voltage and adaptive light-sensing threshold of the working light sensor tube, and control the first light sensor module and the second light sensor module to work alternately based on the light environment state and / or the exposure working time when the first light sensor module is in the on state. The second light sensor module is the light sensor module other than the first light sensor module among the two light sensor modules.

[0074] In this embodiment, the light-sensing control module compares the adaptive light-sensing threshold with the differential light-sensing voltage of the working light sensor to accurately determine whether the light environment state of the light-transmitting area is in a stable light state or a sudden light state, thus achieving precise detection of changes in the ambient light surrounding the display panel. Specifically, when the differential light-sensing voltage is less than the adaptive light-sensing threshold for multiple consecutive detection cycles, the light environment of the light-transmitting area is in a stable light state; when the differential light-sensing voltage is greater than or equal to the adaptive light-sensing threshold for multiple consecutive detection cycles, it is determined that a real sudden change has occurred in the light environment of the light-transmitting area, i.e., the light environment of the light-transmitting area is in a sudden light state. Subsequently, based on the light environment state and / or the exposure working time of the first light-sensing module, the first light-sensing module and the second light-sensing module are controlled to work alternately, avoiding a single light-sensing module from continuously bearing light irradiation stress for a long time, thereby effectively delaying the photoaging process of each light-sensing module and extending the overall lifespan of the display panel's light-sensing detection.

[0075] It should be noted that the number of consecutive detection cycles must include at least two, and can be customized according to application requirements. This application does not impose any restrictions here.

[0076] Furthermore, in some other feasible embodiments, the above step S30: determining the light environment state of the light-transmitting area based on the differential photosensitive voltage and adaptive photosensitive threshold of the working photosensitive tube may also include the following implementation steps S301 to S303.

[0077] Step S301: Determine the differential photosensitive voltage of the working photosensitive tube in the first photosensitive module in multiple consecutive detection cycles, and detect whether the differential photosensitive voltage in multiple consecutive detection cycles is less than the adaptive photosensitive threshold.

[0078] In this embodiment, the light-sensing control module acquires the differential photosensitive voltage of the working photosensitive tube in the first light-sensing module over multiple consecutive detection cycles, and compares the differential photosensitive voltage of each detection cycle with an adaptive photosensitive threshold to detect whether the differential photosensitive voltage of each detection cycle is less than the adaptive photosensitive threshold. By performing multiple detections of the differential photosensitive voltage over multiple consecutive detection cycles, the interference of accidental fluctuations caused by noise or transient interference in a single detection on the judgment result is eliminated, thereby improving the accuracy and stability of the light environment state determination.

[0079] Step S302: When the differential photosensitive voltage in each detection cycle is less than the adaptive photosensitive threshold, the light environment state of the light-transmitting area is determined to be a stable light state.

[0080] In this embodiment, when the differential photosensitive voltage of the working photosensitive tube in the first photosensitive module is less than the adaptive photosensitive threshold in multiple consecutive detection cycles, the light environment state of the light-transmitting area is determined to be a stable light state. Under this stable light state, the photosensitive control module controls the first photosensitive module to continue to be turned on and maintain its current operation, and simultaneously controls the second photosensitive module to remain turned off, so that the first photosensitive module continuously collects the ambient photosensitive voltage of the light-transmitting area, avoiding the increase in power consumption and unnecessary signal interference caused by frequent switching of photosensitive modules in a stable lighting scenario.

[0081] Step S303: When the differential photosensitive voltage in each detection cycle is greater than or equal to the adaptive photosensitive threshold, the light environment state of the light-transmitting area is determined to be a sudden light state.

[0082] In this embodiment, when the differential photosensitive voltage of the working photosensitive tube in the first photosensitive module is greater than or equal to the adaptive photosensitive threshold in multiple consecutive detection cycles, the light environment state of the light-transmitting area is determined to be a sudden light state. The photosensitive control module switches the detection of the ambient light of the display panel from the first photosensitive module to the second photosensitive module to ensure the response speed of the display panel to changes in real ambient light. At the same time, the first photosensitive module is in the off state during the operation of the second photosensitive module, which slows down the aging process of the first photosensitive module. This realizes the dynamic switching of the two photosensitive modules according to the light environment state, effectively balances the light irradiation stress of the two photosensitive modules, and significantly extends the overall service life of the display panel's photosensitive detection.

[0083] Furthermore, in some feasible embodiments, the above step S30: controlling the first light sensing module and the second light sensing module to work alternately based on the light environment state and / or the exposure working time when the first light sensing module is in the on state, may also include the following implementation steps A10 to A30.

[0084] Step A10: In response to a stable light environment, maintain the first light sensor module in the on state and the second light sensor module in the off state until the light environment changes from a stable light state to a sudden light state. Then, switch the first light sensor module from the on state to the off state and simultaneously switch the second light sensor module from the off state to the on state to complete the alternating operation of the first light sensor module and the second light sensor module.

[0085] In this embodiment, the light-sensing control module responds to a stable light environment state, keeping the first light-sensing module on while the second light-sensing module remains off until the light environment state changes from stable to abrupt. Only then does the first light-sensing module switch from on to off, and simultaneously the second light-sensing module switches from off to on. This ensures that the alternation of operation between the first and second light-sensing modules only occurs when there is a real and continuous abrupt change in the light environment of the light-transmitting area, effectively filtering out false triggering of the switching of the light-sensing modules due to non-continuous ambient light disturbances. Furthermore, because the first and second light-sensing modules alternate synchronously based on real changes in the light environment, the light irradiance stress of the two light-sensing modules is evenly distributed. Neither light-sensing module is subjected to continuous ambient light irradiation for an extended period. While ensuring the continuity and accuracy of ambient light detection, this effectively slows down the photoaging process of each light-sensing module, significantly extending the overall lifespan of the display panel's light-sensing detection system.

[0086] And / or, step A20: accumulate the exposure working time when the first light-sensing module is in the on state, and obtain the dynamic rotation threshold of the first light-sensing module.

[0087] In this embodiment, the exposure duration of the first photosensitive module when it is in the on state is accumulated by the photosensitive control module, thereby obtaining time-dimensional data measuring the cumulative light irradiation received by the first photosensitive module. A dynamic switching threshold for the first photosensitive module is also obtained. This dynamic switching threshold is dynamically adjusted based on the degree of aging reflected by the dark-state drift voltage output by the reference photosensitive tubes in the first and second photosensitive modules, allowing the dynamic switching threshold to be adjusted accordingly to follow the aging rate of the reference photosensitive tube of the same model as the working photosensitive tube. By obtaining the exposure duration and the dynamic switching threshold, this application provides an accurate and reliable basis for determining whether to perform alternating operation of the first and second photosensitive modules.

[0088] Step A30: When the cumulative exposure time reaches the dynamic switching threshold of the first light sensor module, switch the first light sensor module from the on state to the off state, and simultaneously switch the second light sensor module from the off state to the on state, so as to complete the alternation of operation between the first light sensor module and the second light sensor module.

[0089] In this embodiment, the dimming module in the light-sensing control module has a built-in timer. When the exposure working time of the first light-sensing module accumulated by the timer reaches the dynamic rotation threshold of the first light-sensing module, the light-sensing control module switches the first light-sensing module from the on state to the off state, and simultaneously switches the second light-sensing module from the off state to the on state, so as to complete the alternating operation of the first and second light-sensing modules. This causes the first light-sensing module to stop receiving ambient light and enter a sleep state, and the photoaging process of the first light-sensing module is paused. After the second light-sensing module switches from the off state to the on state, the working photosensitive tube in the second light-sensing module begins to collect the ambient light sensing voltage of the light-transmitting area. The second light-sensing module takes over the ambient light detection from the first light-sensing module. While ensuring the continuity and accuracy of ambient light detection, it avoids a single light-sensing module from being continuously exposed to ambient light for a long time, effectively balances the light irradiation stress of the two light-sensing modules, and significantly extends the overall service life of the display panel's light-sensing detection.

[0090] In a specific embodiment, refer to Figure 6 When the accumulated exposure time of the first light sensor module reaches the dynamic switching threshold T_swap1, the light sensor control module performs a forced switching operation. Specifically, the light sensor control module controls the first control signal line LC1 to output a low level. The low level of the first control signal line LC1 controls the first light sensor module to turn off, stop receiving ambient light, and enter a sleep state, thus pausing the photoaging process of the first light sensor module. At the same time, the light sensor control module controls the second control signal line LC2 to output a high level, driving the second light sensor module to turn on. This allows the second light sensor module to seamlessly take over the work of the first light sensor module. Furthermore, while the second light sensor module is turned on, the timer count is simultaneously reset and the accumulation of the exposure time of the second light sensor module begins. This cycle repeats, achieving the alternating operation of the two light sensor modules.

[0091] Furthermore, in some other feasible embodiments, step A20 above: obtaining the dynamic switching threshold of the first light-sensing module may also include the following implementation steps A201 to A203.

[0092] Step A201: Determine the current aging threshold of the first photosensitive module based on the dark-state drift voltage of the reference photosensitive tube.

[0093] In this embodiment, the dark-state drift voltages output by the reference photocells in each photocell module are summed and then divided by the total number of photocell modules. The average drift voltage is then used as the current aging threshold of the first photocell module (i.e., any photocell module), providing an accurate benchmark for the subsequent adjustment of the dynamic rotation threshold.

[0094] Step A202: If the current aging threshold is less than the preset mild aging threshold, update the basic rotation threshold of the first light sensor module according to the current aging threshold, and use the updated basic rotation threshold as the dynamic rotation threshold of the first light sensor module.

[0095] In this embodiment, the light-sensing control module compares the current aging threshold with a preset mild aging threshold. If the current aging threshold is less than the preset mild aging threshold, it further detects whether the current aging threshold is less than a preset severe aging threshold. If the current aging threshold is between the mild and severe aging thresholds, it is determined that the first light-sensing module has entered the mild aging period, and the aging speed of the first light-sensing module accelerates. At this time, the product of the basic rotation threshold of the first light-sensing module and the preset mild shortening coefficient is determined as the dynamic rotation threshold. Since the dynamic rotation threshold is shorter than the basic rotation threshold, the light-sensing control module can trigger the alternating operation of the first and second light-sensing modules with a shorter cycle, thereby performing rotation in time before the light aging of the first light-sensing module accumulates excessively, effectively delaying the light aging process of the first light-sensing module.

[0096] When the current aging threshold is lower than the preset severe aging threshold, the light-sensing control module determines that the first light-sensing module has entered a severe aging period. The light-sensing control module issues a maintenance warning and determines the dynamic switching threshold of the first light-sensing module as the product of its basic switching threshold and a preset severe shortening coefficient. Since the preset severe shortening coefficient is lower than the preset mild shortening coefficient, the dynamic switching threshold is further shortened relative to the dynamic switching threshold for the mild aging period. Based on the further shortened dynamic switching threshold, the light-sensing control module triggers the alternating operation of the first and second light-sensing modules at a higher frequency, putting them into an emergency alternation mode. By increasing the alternation frequency of the first and second light-sensing modules, the single exposure time of both modules is significantly shortened, thereby maximizing the utilization of their remaining lifespan and preventing the sudden failure of a single light-sensing module due to severe aging, which could interrupt the ambient light detection function of the display panel, thus ensuring the continuity and reliability of the ambient light detection function.

[0097] It should be noted that the preset mild aging threshold is greater than the preset severe aging threshold, and the preset severe shortening coefficient < preset mild shortening coefficient < 1 is satisfied.

[0098] Step A203: If the current aging threshold is greater than or equal to the mild aging threshold, determine the dynamic rotation threshold of the first light sensing module as the base rotation threshold.

[0099] In this embodiment, when the current aging threshold is greater than or equal to the preset mild aging threshold, the light-sensing control module determines that the first light-sensing module is in a healthy period and its light aging rate is at a normal level. The light-sensing control module directly determines the basic rotation threshold of the first light-sensing module as its dynamic rotation threshold. At this time, the dynamic rotation threshold maintains the factory-calibrated standard cycle. The light-sensing control module performs alternating operation between the first and second light-sensing modules based on this dynamic rotation threshold. This avoids increased power consumption and detection noise due to excessively frequent rotation, and can timely balance the light irradiance stress of the two light-sensing modules under normal aging rates. Thus, while ensuring the stability of ambient light detection of the display panel, it effectively slows down the light aging process of each light-sensing module and significantly extends the overall lifespan of the display panel's light-sensing detection.

[0100] In addition, this application also provides a display device. Please refer to... Figure 7 , Figure 7 This is a schematic diagram of the display device involved in the embodiments of this application. Specifically, the display device in the embodiments of this application may be a device for locally running a display panel driving method.

[0101] The display device includes the display panel described above, and / or a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the driving method for the display panel described above.

[0102] like Figure 7 As shown, the display device in this embodiment may include: a display panel, a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface).

[0103] The memory 1005 is disposed on the main body of the display device. The memory 1005 stores a program that performs corresponding operations when executed by the processor 1001. The memory 1005 is also used to store parameters used by the display device. The memory 1005 can be a high-speed RAM or a stable, non-volatile memory, such as a disk drive. Optionally, the memory 1005 can also be a storage device independent of the aforementioned processor 1001.

[0104] Those skilled in the art will understand that Figure 7 The display device structure shown does not constitute a limitation on the display device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0105] like Figure 7 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a driver for the display panel.

[0106] exist Figure 7 In the display device shown, the processor 1001 can be used to call the driver program of the display panel stored in the memory 1005 and execute the steps of the display panel driving method as described above.

[0107] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, An element specified by the phrase "includes a..." does not exclude the existence of other identical elements in the process, method, article, or system that includes that element.

[0108] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0109] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a display device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0110] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A display panel, the display panel comprising a display area and a non-display area arranged in a ring around the display area, the non-display area being provided with a black matrix, the black matrix comprising a light-transmitting area and a light-blocking area, characterized in that, The display panel includes: Two light-sensing modules are provided. Each light-sensing module includes a working light sensor tube disposed in the light-transmitting area and a reference light sensor tube disposed in the light-shielding area. The working light sensor tube and the reference light sensor tube are of the same model. The working light sensor tube is used to collect the ambient light voltage of the light-transmitting area, and the reference light sensor tube is used to simultaneously collect the dark-state drift voltage of the light-shielding area when the working light sensor tube collects the ambient light voltage. A light-sensing control module, electrically connected to each of the light-sensing modules, is configured as follows: An aging factor for the first light-sensing module is determined based on the ambient light sensing voltage and the dark-state drift voltage. An adaptive light-sensing threshold is determined based on the aging factor and a preset light-sensing reference threshold. The first light-sensing module is any one of the two light-sensing modules. The light environment state of the light-transmitting area is determined based on the differential photosensitive voltage of the working photosensitive tube in the first photosensitive module and the adaptive photosensitive threshold. Based on the ambient light conditions and / or the exposure duration when the first light sensor module is in the on state, the first light sensor module and the second light sensor module are controlled to work alternately. The second light sensor module is the light sensor module other than the first light sensor module among the two light sensor modules.

2. The display panel as described in claim 1, characterized in that, The light sensing control module includes a first control signal line, a first switching module, and a first compensation module. The working light sensor and the reference light sensor in the first light sensing module are the first light sensor and the second light sensor, respectively. The first control signal line is electrically connected to the gate of the first phototransistor and the gate of the second phototransistor, respectively. The first path terminal of the first phototransistor and the first path terminal of the second phototransistor are electrically connected to a preset power supply potential terminal, respectively. The second path terminal of the first phototransistor is electrically connected to the signal input node of the first switching module and the signal compensation node of the first compensation module, respectively. The second path terminal of the second phototransistor is electrically connected to the inverting input node of the first compensation module. The light sensing control module further includes a second control signal line, a second switching module, and a second compensation module. The working light sensor and the reference light sensor in the second light sensing module are the third light sensor and the fourth light sensor, respectively. The second control signal line is electrically connected to the gate of the third phototransistor and the gate of the fourth phototransistor, respectively. The first path terminal of the third phototransistor and the first path terminal of the fourth phototransistor are electrically connected to a preset power supply potential terminal, respectively. The second path terminal of the third phototransistor is electrically connected to the signal input node of the second switching module and the signal compensation node of the second compensation module, respectively. The second path terminal of the fourth phototransistor is electrically connected to the inverting input node of the second compensation module.

3. The display panel as described in claim 2, characterized in that, The first switching module includes: a first subtractor, a first comparator, a first switching transistor, a second switching transistor, a first resistor, a second resistor, and a first control transistor; The first path terminal of the first switching transistor is electrically connected to the first path terminal of the second switching transistor; The connection node of the first path terminal of the first switching transistor and the first path terminal of the second switching transistor forms the signal input node of the first switching module, which is electrically connected to the second path terminal of the first photosensitive transistor and the signal compensation node of the first compensation module, respectively. The gate of the first switch is electrically connected to a preset first gate signal terminal, the second path terminal of the first switch is electrically connected to the first terminal of the first resistor, and the second terminal of the first resistor is electrically connected to the first input terminal of the first subtractor. The gate of the second switch is electrically connected to a preset second gate signal terminal, the second path terminal of the second switch is electrically connected to the first terminal of the second resistor, and the second terminal of the second resistor is electrically connected to the second input terminal of the first subtractor. The output of the first subtractor is electrically connected to the inverting input of the first comparator, the non-inverting input of the first comparator is electrically connected to a preset adaptive threshold signal, the output of the first comparator is electrically connected to the gate of the first control transistor, the first path terminal of the first control transistor is electrically connected to a preset low potential terminal, and the second path terminal of the first control transistor is electrically connected to the second control signal line. The second switching module includes a second subtractor, a second comparator, a third switch, a fourth switch, a third resistor, a fourth resistor, and a second control transistor; The first path terminal of the third switch is electrically connected to the first path terminal of the fourth switch. The connection point where the first path terminal of the third switch is electrically connected to the first path terminal of the fourth switch forms the signal input node of the second switching module, and is electrically connected to the second path terminal of the third photosensitive tube and the signal compensation node of the second compensation module, respectively. The gate of the third switch is electrically connected to a preset first gate signal terminal, the second path terminal of the third switch is electrically connected to the first terminal of the third resistor, and the second terminal of the third resistor is electrically connected to the first input terminal of the second subtractor. The gate of the fourth switch is electrically connected to a preset second gate signal terminal, the second path terminal of the fourth switch is electrically connected to the first terminal of the fourth resistor, and the second terminal of the fourth resistor is electrically connected to the second input terminal of the second subtractor. The output of the second subtractor is electrically connected to the inverting input of the second comparator, the non-inverting input of the second comparator is electrically connected to a preset adaptive threshold signal, the output of the second comparator is electrically connected to the gate of the second control transistor, the first path terminal of the second control transistor is electrically connected to a preset low potential terminal, and the second path terminal of the second control transistor is electrically connected to the first control signal line.

4. The display panel as described in claim 2, characterized in that, The first compensation module includes: a fifth resistor, a third comparator, and a fifth switching transistor; The first end of the fifth resistor constitutes the inverting input node of the first compensation module and is electrically connected to the second path terminal of the second photosensitive tube. The second end of the fifth resistor is electrically connected to the inverting input of the third comparator, the non-inverting input of the third comparator is electrically connected to a preset reference signal terminal, the output of the third comparator is electrically connected to the gate of the fifth switch, and the first path terminal of the fifth switch is electrically connected to a compensation voltage source. The second path terminal of the fifth switching transistor constitutes the signal compensation node of the first compensation module, and is electrically connected to the signal input node of the first switching module and the second path terminal of the first photosensitive transistor, respectively. The second compensation module includes: a sixth resistor, a fourth comparator, and a sixth switching transistor; The first end of the sixth resistor constitutes the inverting input node of the second compensation module and is electrically connected to the second path terminal of the fourth photosensitive tube. The second end of the sixth resistor is electrically connected to the inverting input of the fourth comparator, the non-inverting input of the fourth comparator is electrically connected to a preset reference signal terminal, the output of the fourth comparator is electrically connected to the gate of the sixth switch, and the first path terminal of the sixth switch is electrically connected to a compensation voltage source. The second path terminal of the sixth switch tube constitutes the signal compensation node of the second compensation module, and is electrically connected to the signal input node of the second switching module and the second path terminal of the third photosensitive tube, respectively.

5. The display panel as described in claim 1, characterized in that, The display panel includes: A first substrate, wherein both the first photosensitive module and the second photosensitive module are disposed on the first substrate; A second substrate is disposed opposite to the first substrate, and a black matrix is ​​disposed between the second substrate and the first substrate. The black matrix is ​​disposed on the side of the second substrate facing the first substrate, wherein the black matrix includes alternating light-shielding areas and light-transmitting areas. The working photosensitive tube is disposed corresponding to the light-transmitting area in a direction perpendicular to the first substrate, and the reference photosensitive tube is disposed corresponding to the light-shielding area in a direction perpendicular to the first substrate.

6. A driving method for a display panel, characterized in that, The driving method is applied to the display panel according to any one of claims 1 to 5, and the driving method includes: When the working photosensitive tube in the first photosensitive module collects the ambient light voltage of the light-transmitting area, the reference photosensitive tube in the first photosensitive module is controlled to synchronously collect the dark-state drift voltage of the light-shielding area. The first photosensitive module can be any one of the two photosensitive modules. When the light sensing control module receives the ambient light sensing voltage and the dark state drift voltage, it determines the aging degree factor of the first light sensing module based on the ambient light sensing voltage and the dark state drift voltage, and determines the adaptive light sensing threshold based on the aging degree factor and the preset light sensing reference threshold. The light environment state of the light-transmitting area is determined based on the differential light-sensing voltage of the working light sensor and the adaptive light-sensing threshold. Based on the light environment state and / or the exposure working time when the first light sensor is in the on state, the first light sensor and the second light sensor are controlled to work alternately. The second light sensor is the light sensor other than the first light sensor among the two light sensor modules.

7. The driving method as described in claim 6, characterized in that, The step of determining the light environment state of the light-transmitting area based on the differential photosensitive voltage of the working photosensitive tube in the first photosensitive module and the adaptive photosensitive threshold includes: Determine the differential photosensitive voltage of the working photosensitive tube in the first photosensitive module in multiple consecutive detection cycles, and detect whether the differential photosensitive voltage in multiple consecutive detection cycles is less than the adaptive photosensitive threshold. When the differential photosensitive voltage in each detection cycle is less than the adaptive photosensitive threshold, the light environment state of the light-transmitting area is determined to be a stable light state. When the differential photosensitive voltage in each detection cycle is greater than or equal to the adaptive photosensitive threshold, the light environment state of the light-transmitting area is determined to be a sudden light state.

8. The driving method as described in claim 6, characterized in that, The step of controlling the alternating operation of the first and second light-sensing modules based on the ambient light conditions and / or the exposure duration when the first light-sensing module is in the on state includes: In response to a stable light environment state, the first light sensor module remains in the "on" state and the second light sensor module remains in the "off" state until the light environment state changes from a stable light state to a sudden light state. At this point, the first light sensor module is switched from the "on" state to the "off" state, and simultaneously the second light sensor module is switched from the "off" state to the "on" state, thus completing the alternating operation of the first and second light sensor modules; and / or, The exposure duration of the first light-sensing module when it is in the "on" state is accumulated, and the dynamic switching threshold of the first light-sensing module is obtained. When the cumulative exposure time reaches the dynamic switching threshold of the first light-sensing module, the first light-sensing module is switched from the on state to the off state, and the second light-sensing module is switched from the off state to the on state simultaneously, so as to complete the alternating operation of the first light-sensing module and the second light-sensing module.

9. The driving method as described in claim 8, characterized in that, The step of obtaining the dynamic switching threshold of the first optical sensing module includes: The current aging threshold of the first photosensitive module is determined based on the dark-state drift voltage of the reference photosensitive tube; If the current aging threshold is less than the preset mild aging threshold, the basic rotation threshold of the first photosensitive module is updated according to the current aging threshold, and the updated basic rotation threshold is used as the dynamic rotation threshold of the first photosensitive module. If the current aging threshold is greater than or equal to the mild aging threshold, the dynamic rotation threshold of the first photosensitive module is determined as the basic rotation threshold.

10. A display device, characterized in that, The display device includes the display panel according to any one of claims 1 to 5; and / or, The memory, the processor, and the computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the driving method for the display panel as described in claims 6 to 9.

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